Fuse plug and socket combination



Feb. l, 1955 c. FISHER 2,701,349 FUSE PLUG ANO SOCKET COMBINATION Filed Jan. 25. l95lu Snvcnror CLA Yroh/ Fwse United States Patent O FUSE PLUG AND SOCKET COMBINATION Clayton Fisher, Manitowoc, Wis.

Application January 25, 1951, Serial No. 207,737

1 Claim. (Cl. 339-155) This invention relates to improvements in fuse plug and socket combinations and more particularly to novel fuse plugs and socket combinations which may be plugged into a conventional wall socket and which may in turn receive the plug of an electric appliance.

An object of the invention is to provide devices of the type of simple and inexpensive construction with a minimum of parts and of relatively inexpensive manufacture.

An object of the invention is to provide a device of the type which may be plugged into a wall socket and which will receive both a fuse and the contact blade of a plug attached to an electrical appliance.

Other and further objects of the invention will appear as the description proceeds, reference being had to the accompanying drawing, in which:

Fig. 1 is a view in perspective of a fuse plug embodying the invention.

Fig. 2 is a view in vertical section of the same With a view in elevation of a fuse adapted for insertion therein.

Fig. 3 is a view in horizontal section taken on line 3-3 of Fig. 2.

Fig. 4 is a sectional view taken centrally through the fuse receptacle.

Fig. 5 is a horizontal sectional view of a modified form of the invention.

Fig. 6 is a View in perspective of another modiiication of the invention.

Fig. 7 is a fragmentary sectional View thereof.

Fig. 8 is another perspective view of the same taken from the contact blade side thereof.

Referring more particularly to the drawing, the numeral 10 refers to the device generally, having a pair of casing portions 11 and 12 normally held in assembly by the bolt 13 and nut 14.

The casing portion 11 is apertured as at 1S to accommodate the protruding contact blades 16 and 17. The casing portion 12 has a pair of apertures as at 18 within which are disposed the resilient terminal members 19 and 20. The Contact blade 16 is directly connected with the resilient member 19 by rivets or other means 21. The resilient member 20 is connected by rivet or other means 22 with the threaded shell 23 adapted to receive the fuse 24. The contact blade 17 is connected by rivet or other means 25 to the member 26 which is apertured as at 27 to spacedly encircle the bolt 13 and is connected to the contact member 28. The Contact member 28 will touch a similar member 29 on the fuse 24 when the latter is threaded tightly within the shell 23.

ln the form of the invention shown in Fig. 5 the casing 30 has a pair of oppositely disposed receptacle formations 31 and 32, housing the threaded shells 33 and 34. The housing 30 is provided with a pair of apertures as at 35 to accommodate the protruding contact blades 36 and 37 which are connected by rivet or other means 38 to the resilient contact members 39 and 40 which latter are centrally disposed at the inner ends of the threaded shells 33 and 34. The casing 30 is apertured at its opposite end as at 41 and has interiorly thereof the resilient contact members 42 and 43 which are iiXed by rivet or other means 44 to the shells 33 and 34 respectively.

The form of the invention shown in Figs. 6, 7, and 8 Patented Feb. l, 1955 ICC is adapted for use in 220 volt circuits as employed in connection with three phase motors or the like. A drum 50 is provided with three peripheral apertures or recesses as at 51 serving to house the threaded shells 52. Three protruding contact blades 53 are secured as at 54, one to each of the shells 52. The opposite face of the drum 50 is provided with three apertures as at 55 within which three resilient contact members 55 are disposed. Each resilient contact member 56 is connected to an electrical conductor 57 terminating in a contact portion 58 which serves to maintain electrical connection with the fuse 59 when the latter is securely turned Within the shell 52.

In use, the plug 10 may be inserted by the blades 16 and 17 into any conventional wall socket. A fuse 24 is securely threaded within the shell 23 until the Contact member 29 is fixed closely against the contact member 28 of the plug. The Contact blades of any desired electrical appliance may then be inserted Within the apertures as at 18 and it will thus be apparent that the fuse 24 is Within the circuit and will be blow by any overload of current. The dual fuse plug shown in Fig. 5 may be similarly employed only that two fuses are necessary. The form of the invention shown in Figs. 6, 7, and 8 has three contact blade receptacles and three oppositely disposed contact blades for insertion into a 220 volt Wall receptacle.

It will be understood that the device is capable of many modifications in structure and design, without departing from the spirit of the invention, within the scope of the appended claim.

Having thus described the invention, what is claimed and desired to be secured by Letters Patent of the United States is:

A fuse plug and socket comprising a pair of semicircular mating body sections of insulating material disposed in confronting abutting relation to form a cylindrical casing, ange means on one of the ends of each body section disposed in abutting relation to form a closed end for the casing, said other end of each body section being disposed in confronting relation to form a fuse receiving socket, a threaded metallic shell itted in the socket and adapted to receive a fuse, said body sections having aligned solid portions disposed at the inner end of the socket and arranged transverse thereto, said solid portions having aligned openings, a bolt having its shank disposed in said openings and securing said body sections together, a contact member spacedly circumposed on the shank and iixedly interposed between the ends of the solid portions, said Contact member having ak contact end disposed at right angles thereto and positioned at the inner end of the socket, transversely thereof to contact the inner end of a fuse fitted in the shell, blade contact members laterally projecting from one of the body sections and disposed parallei to and on opposite sides of the shank, a right angular projection on the contact member disposed parallel to the shank, a rivet securing one of the blade contact members in side by side contact with the projection, said other of the body sections having blade receiving orifices disposed opposite to and aligned with the blade contact members, a pair of resilient contact elements arranged within the oriiices, means connecting the other of said blade contact members to one of said resilient contact elements, and means connecting the other of said resilient contact elements to the fuse shell.

References Cited in the file of this patent UNITED STATES PATENTS 1,717,836 Conner lune 18, 1929 1,730,873 Barnett Oct. 8, 1929 1,876,823 Adams Sept. 13, 1932 1,950,181 Kelley et al. Mar. 6, 1934 2,454,024 Alemaghides Nov. 16, 1948 

